Respostas

2014-02-21T14:42:54-03:00
Resposta

Q = n.e

i = Q /t
i = n.e / t

4min = 240s

5 = n . 1,610⁻¹⁹ /240

n = 5 .240 / 1,6.10⁻¹⁹

n = 1200 / 1,6 .10⁻¹⁹

n = 750.10¹⁹

n = 7,5.10²¹  eletrons